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(No Model.)

O. M. RICHMOND. ARTIFICIAL DENTURE.

No. 277,936. Patented May 22,1883.

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UNITED STATES PATENT OFFICE.

GASSIUS M} RICHMOND, OF NEW YORK, N. Y.,ASSIGNOR TO THE RlGHMOND TOOTH CROWN COMPANY, OF SAME PLACE.

ARTIFICIAL o NTuRE.

SPECIFICATION formingpart of Letters Patent No.- 277,936, dated May 22, 1883.

Application filed January 8, 1883. (No model.)

5 in Artificial Dentures, of which the following is a full, true, and exact description, reference being had to the accompanying drawing.

This invention relates to a method of taching an inclosing-cap to a root or tooth by 10 means of a screw or pin projecting laterally through the cap and into the root.

My invention will be'reatlily understood from the accompanying drawing, in which A represents a prepared tooth; B, the cap to be 15 applied thereto, and G the screw to be used to hold the same together. The root A is first properly prepared and shaped to receive the metallic cap or support 13. As shown, B is shaped to correspond with the form of a tooth- The cap being placed in position upon the root, a hole is laterally drilled, as shown at D, through the cap and into the root,'and

the pin or screw is then driven or placed in situation in said holes, so as to lock the cap and root firmly together. This method, of at taching a cap to a root prevents thelongitudinal \vlthdrawal of the cap from the root without splitting the root, while by the methods heretofore in use, if the cement within the cavity in any way lost its hold, thecap became liable to belongitudinally withdrawn from the root.

What I claim as my invention, anddesire to secure by Letters Patent, is-

The combination of a-root and a hermetically-closed cap placed overand inclosing the end of said root or tooth, and a screw passing through the cap and root and projecting substantially at right angles to the major axis of the tooth, substantially as described.

OASSIUS M. RICHMOND. Witnesses:

OTTO BAUMANN, WILLIAM PAXTON. 

